How far into budding are these? Being from the same area as yourself, I know the wet season is coming and if your not about finished budding within the next week or so you'll want to get them covered and make sure you get lots of air movement around them, and not allow them to get soaked once the weather cools. Powdery mildew is notorious up here and usually gets the ones I don't have covered...even when I treat with preventives. Post up some pics! Peace and great luck to you!! gman